Improvement in hubs for vehicle wheels



UNITED STATES PIIINEAS JONES, OF NEWARK, NEW JERSEY.

IMPROVEMENT IN HUBS FOR VEHICLE WHEELS.

Specification forming part of Letters Patent No. 128,547, dated July 2,1872.

this specification and represents, in-

Figure 1, a front view 5 Fig. 2, a transverse section on line x x,- Fig.3, a longitudinal section on line yy; and in Fig. 4, a section throughone of the mortises on line z z of Fig. 3, full size.

This invention relates to an improvement in the construction, of thatclass of carriagehubs which are composed of a Wood center, and ametallic band for the support ofthe spokes.

In the usual construction of this class of wheels the mortises orrecesses in the metal band through which the spokes pass are smooth andthe spokes made to t closely into the said recesses, and usually with atenon on the spoke to extend into a corresponding mortise in the hub.The spoke being driven hard into this smooth recess will stop so soon asit comes to a bearing against the surface of the metal, the extent ofthe bearing'between the wood and metal being so great that the wood willnot yield; hence the slightest shrinkage loosens the spoke in thebearing, and the transverse strain-that is, the strain longitudinally inthe hub-is brought entirely against the outer end of the recess in whichthe spoke is placed, and that indenting the spoke allows still moreplay; hence a little wear loosens the spoke, and the extent of thisloosening must unavoidably increase until the spoke is reset. Toovercome this difficulty and so construct the mortises that the spokemay be rst driven to a more solid bearing and have a greater transversesupport, is the primary object of this invention; and my inventionconsists in constructing the recesses or mortises in the hub withcorrugated or serrated surfaces.

A is the wood center of the hub bored out for the box, and mortised, asat a., to receive the tenon of the spoke in the usual manner. B is ametallic band in outward form not unlike many other bands used uponcarriagehubs, and with recesses d formed therein cor responding to themortises in the hub, as seen in Fig. 2, so that the spokes will bedriven into the hub through the said band and take their bearing in theusual manner.

In order to accomplish the object of this invention before named Icorrugate the sides of the mortises or recesses in the band, as seen inFig. 4, so thatpwhen the spoke is driven into the hub these corrugationswill easily embed themselves, or the wood will yield, so as to allowthem to embed into the spoke until the shoulder 'of the tenon reachesthe wood center; hence it is always certain that the shoulder comes to abearing. Each one of these projections in the numerous corrugationsforms a support for the spoke against a strain longitudinally on thehub, taking so much of the strain from the outer ange or rim of theband, these corrugations thus accomplishing the two objects designed, asbefore mentioned.

In order to insure the proper relative position of the band with itsrecesses to the mortises in the hub I form a shoulder on the wooden hub,as at b,in such relative position to the mortises that, when the band isdriven on, the edge Will strike and rest against the said shoulder whenthe band has arrived at its proper position, as seen in Fig. 3, thusgreatly facilitating the setting of the band. This enables me to bringthe wood ush with the band, sothat no break appears upon the hub, or, inother words, that the hub thus formed will not in its outline dilferfrom the best wooden hubs.

While this invention is here represented as applied to hubs composed ofa wood center and metal band, it will be obvious to those familiar withthis class of, manufacture that the corrugated surface of the recess toreceive the spoke is equally applicable to hubs composed entirely ofmetal. I therefore do not Wish to be understood as confining myinvention to any particular class of hubs.

I claim as my invention- In the hub of a carriage -wheel having a metalsupport for the spokes, the recesses which form the bearing for the saidspokes when formed with vertically corrugated surfaces, substantially asdescribed.

Witnesses: PHINEAS JONES.

A. J. TIBBITS, J. H. SHUMWAY.

